Lamp.



T. J. COBQORAN.

LAMP. APPLICATION FILE-D SEPT. 12. 1914.

Llw wo Farmed @1227, 1915.

2 SHEETS-SHEET l- T. J. CORCORAN.

LAMP.

APPLICATION FILED SEPT- l2, x914.

Patented Apr. 27, 1915.

2 SHEETSSHEET 2.

% fA/viA rm? 1 WW THOMAS J. CORCORAN, OF CINCINNATI, OHIO.

LAME.

Specification of Letters Patent. Patented Apr. 27, 1915.

Application filed September 12, 1914. Serial No. 861,410.

To all'wiz am it may concern:

Be it known that I, THOMAS J CORCORAN, a citizen of the United States, residing at Cincinnati, in the county of Hamilton and State of Ohio, have invented certain new and useful Improvements in Lamps, of

' which the following is a specification.

My invention relates to lamps, particularly of the character employing a reflector, and has forits object the provision of substantial and simple means for readily assembling the body, reflector and closure, whereby the closure and body are firmly held together and fixed with relation to each other,.andthe reflector is pressed toward the closure for being positioned with relation to both the closure and body, and in such manner that rattling between the parts is avoided, and whereby further a cushion is provided between the reflector and the closure for excluding dust from the inside of the reflector.

The invention will be further readily understood. from the following description and claims, and from the drawings, in which latter:

Figure 1 is a side elevation of my improved device. Fig. 2 is a front elevation of my improved device in assembled relation and partly broken away for better illustration of parts. Fig. 3 is a vertical longitudinal section thereof on the line 3--3 of Fig. 2.

Fig. 4 is an inside perspective view of thedoor, partly broken away. Fig. 5 is an enlarged perspective View, partly broken away, showing the body, reflector and door in separated relations. Fig. 6 is an enlarged side elevation of the parts, partly broken away, showing the hook securing the door, in deflected or looking position in full lines, and in normal position in dotted lines. Fig. 7 is a longitudinal section taken on a line corresponding to the line 77 of Fig. 8; and, Fig. 8 is a cross-section taken on a line corresponding to the line 88 of Fig. 6.

11 represents the body of the lamp which at its forward end has an inwardly extending annular flange 12 in rear of which there is preferably an annular cavity 13, exemplified as formed by the substantially cylindrical portion 14 of the outer end of the body located at the forward end of the outwardly flaring portion 15 of the body.

The flange 12 is preferably bent inwardly.

from the outer end of the body, as by spinning, and is preferably integral with the body. The body is shown of parabolic form havlng an opening 16 at its front end.

llooks 21 are secured to the flange, and for aiding in holding the closure to the body are preferably spring-hooks, in the present instance respectively comprising a base 22 which at a point preferably intermediate of its ends is secured to the rear face of the flange by a tension-member, shown as a screw 23, passing through the flange and received, in a threaded socket 24 in the base. The base extends parallel with the flange.

The hook further comprises a shank 25 bent preferably at right angles to the base and having a bend 26 between the base and shank forming a spring. The finger 27 of the hook extends from the shank in the general direction of the flange and is shown curved to correspond substantially to the curvature of the annular flange. It has a rearwardly sloping-rearface 28 at its outer end which terminates in a knob 29, in rear of which there'is a recess 30, forming a latch. The hook is preferably formed of steel and tempered so as to form a spring-hook. There is a series of these hooks arranged about the flange, three hooks being shown equal distances apart. Springs 31 are placed preferably at the respective hooks, being shown as leaf-springs. These springs are provided respectively with a slot 32 through which the shank 25 of the hook projects, and with positioning lips 33 received in holes 34 in the flangel2. A reflector 36, which is shown of parabolic shape, is received in the cavity of the body and has an opening 37 at its front end. The reflector is provided at its forward end with an outwardly extending annular flange 38 provided with slots 39 spaced apart equal distances and arranged to register with the hooks 21, the finger-ends of the hooks being received through said slots, the slots extending preferably in the general direction of the annular flange 38 and being shown curved to correspond substantially to the curvature of said annular flange. The reflector is provided adjacent to the inner edge of the annular flange 38 with a forwardly extending annular bulge 40, which at its apex is provided with an an nular groove 41, in which an annular cushion-member 42 is received. This annular cushion-member may be, for instance, a fabric or rubber annularly arranged to coact with the closure for forming a cushion between the reflector and the closure capable of excluding dust, Water or foreign substances from the inside of the reflector.

"When the outer ends of the hooks are received through the slots 39, the reflector may be turned for locating the end walls of the slots 39 in rear of the knobs 29 of the hooks, the springs 31 urging the flange 38 toward said hooks for holding the reflector to the body of the lamp. The flange 38 is provided with a rearwardly extending knob 43 arranged to be received in the slot of one of the springs 31 forpreventing unintentional turning of the reflector.

In the form shown, the rear of the reflector is provided with an aperture 46 with which a sleeve 47 registers the sleeve being rigidly secured to the reflector. A lampsocket 48 is received in the sleeve and held against rotation with relation thereto by means of a spline-connection consisting of a tongue 1-9 on the socket and a groove 50 in the bore of the sleeve extending lengthwise of the sleeve. An electric incandescent lamp-bulb 51 has usual releasable bayonetconnection 52 with the sleeve.

An adjusting screw 53 is secured to the lamp-socket. A nut 54 is journaled in the rear end of the body, being received through an aperture 55 therein. It has a head 56 at its outer end and has threaded connection with the adjusting screw. The nut is prevented from moving lengthwise inthe aperture in the body by contact of the head 56 with the outer face of the body and a nut 57 having threaded connection 58 with the nut 54:, a spring washer 59 and a collar 60 being interposed between the nut 57 and the inner face of the rear end of the body, the collar 60 being held against turning on the screw by any suitable means.

Adjustment of the adjusting screw 53' adjusts the lamp-socket 48 forwardly and rearwardly with relation to the reflector for adjusting said bulb in the focus of the reflector. The reflector is readily removed by removing the lamp-bulb 51, depressing the spring 31 in which the knob -l3 is received, and turning the reflector so as to release it from the books 21. The reflector may then be drawn forwardly out of the lamp body.

61 represents the closure of the lamp, serving as a door. It is exemplified as comprising a ring-member 62 and a transparent member 63, which latter may be a glass sheet, held in place by suitable clips 4-4. The ringmemher in the present exemplification comprises an outer ring-element 64 and an inner ring-element 65. The outer ring-element comprises an inwardly extending annular portion 66 against which the outer face of the glass 63 is arranged to be received. The inner ring-element is shown formed with a radially extending ledge 67, shown annular, and with a shoulder 68, also shown annular, in rear of the ledge 67, in rear of which shoulder the inner ring-element extends rearwardly, the rear edge of the outer ring-element being bent about the rear end of the inner ring-element, as shown at 69, for forming a cylindrical portion 70, arranged, when the closure is assembled on the body, to be received about the cylindrical portion 14 of said body.

The ledge 67 is provided with slots 71 in which the outer end of the hooks 21 are arranged to be received into the cavity 72 between the ring-elements. The slots 71 are shown extending in the general direction of the ledge 67, and are shown curved to correspond substantially to the curvature of the ring-member. The ledges are provided with keepers for the hooks, shown as forwardly extending protrusions 73, adjacent to the ends of the slots, shown formed by indenting the metal of the ledge. The knobs 29 of the hooks are arranged to be received past these keepers for holding the closure and the body in assembled relation.

In assembling the closure upon the body, the closure is placed in front of the body with the rear annular extension thereof received about the cylindrical portion 14 of the body and with the slots 71 in the ringmember registering with the hooks 21 on the body-member. Rotation of the closure causes the end walls of the slots and the protrusions 73 to be received under the rearwardly sloping rear faces 28 of the hooks. Upon further rotation of the closure or door, the said protrusions are caused to ride upon said rearward sloping rear faces 28, wedge-like, for drawing the closure toward the body- The spring resistance of the' hooks 21 is brought into action, as by deflecting the fingers of said hooks out of their normal positions. The turning of the closure is continued until the latch-portions of the hooks snap into latching positions be. hind the keepers 73, the shoulder 68 riding upon the annular outer edge 74 of the flange 12. The locking position of the latchportions of the hooks is shown in full lines in Fig. 6, the normal position thereof being shown in dotted lines in said' figure.

The spring resistance of the hooks, and the coacting contact-parts or stops betweenthe closure and body, exemplified by said shoulder and said outer edge. fix the relation between the closure and the body and firmly hold said parts together in said fixed relation.

The rear face of the transparent member 63 and the annular cushion-member 42 make contact with each other, the turning of the closure acting to push the reflector rearwardly, resisted by the tension of the springs 31, whereby the annular cushion-member is pressed closely against the transparent member. The knob in the slot 32 of the spring 31 prevents turning of the reflector, when the closure is turned to release the closure,

for maintaining the reflector in the body.

By means of my improved device the reflector is positioned with relation to both the closure and the body, the position of the reflector with relation to the body being determined by the location of the shoulder on the closure coacting with the body of the lamp. In this manner a longitudinal movement of the reflector with relation to the lamp-socket 53 is permitted, with the assurance that when assembled the reflector will be placed in correct focal position with relation to the lamp-bulb, and, furthermore, the position of the lamp-bulb may be adjusted forwardly or rearwardly on the body with relation to the reflector, so that said focal position of the lamp-bulb in the reflector will be maintained irrespective of the removals and returns to position of the closure on the body. The closure isfirmly aflixed to the body independently of the reflector.

Having thus fully described my invention, what I claim as new and desire to secure by Letters Patent, is:

1. In a lamp, the combination of a body, a reflector provided with a laterally outwardly extending flange, a closure comprising a transparent member, said body and closure having coacting stops in rear of the plane in which said flange is located, said stops arranged to coact by a movement parallel to the axis of said reflector, and wedge-like means between said closure and body causing relative movement between said closure and body parallel to said axis for causing coaction between said stops, and means for positioning said reflector.

2. In a lamp, the combination of a body, a reflector, a closure comprising a transparent member, said closure and body having coacting stops arranged to coact by a movement parallel to the axis of said reflector for fixing the limit of movement of said body and closure toward one another, wedge-like spring means between said closure and the' forward end of said body causing relative movement between said closure and body parallel to said axis for causing coaction between said stops at said limit of movement and fixedly securing said body and closure together, and means for positioning said reflector.

3. In a lamp, the combination of a body, a reflector, a closure comprising a transparent member, spring means between the forward end of said body and said closure for drawing said body and closure toward one another, said'body and closure having coacting stops brought into coacting relation by said spring means for maintaining said body and closure in fixed relation, and means for positioning said reflector,

4. In a lamp, the combination of a body,

a reflector, a closure comprising a transparent member, spring means between the forward end of said body and said closure for drawing said body and closure toward one another, said body and closure having coacting stops brought into coacting relation by said spring means for maintaining said body and closure in fixed relation, and spring means acting opposite to said firstnamed spring means for-urging said reflector toward said closure.

5. In a lamp, the combination of a body, a reflector, a closure comprising a transparent member, dust'retarding means between said reflector and' closure, said body and closure provided with coacting stops arranged to coact by a movement parallel to the axis of said reflector for fixing the limit ofmovement of said body and closure toward one another, and means between the forward end of said body and said closure acting oppositely to said stops and arranged by relative rotary movement between said closure and body for causing coacting relation between said stops at said limit of movement and fixedly securing said body and closure together.

6. In a lamp, the combination of a body, a reflector, a closure comprising a transparent member, dust-retarding means between said reflector and closure, for fixing the limit of movement of said body and closure toward one another, said body and closure provided with coacting stops arranged to coact by a movement parallel to the axis of said reflector, spring hooks between the forward end of said body and said closure acting oppositely to said stops and arranged by relative rotary movement between said closure and body for causing coacting relation between said stops, and resilient means acting on said reflector for pressing said dust-retarding means between said reflector and closure.

7. In a lamp, the combination of a body, a reflector, a closure comprising a transparent member, a dust-retarding means between said reflector and closure, said body and closure provided with coacting stops arranged to coact by a movement parallel to the axis of said reflector for fixing the forward limit of movement of said body and closure toward one another, and means between said body and closure acting oppositely to said stops and arranged by relative rotary movement between said closure and body for causing coacting relation between said stops and pressure upon said dust-retarding means.

8. In a lamp, the combination of a body, a reflector, a closure comprising a transparent member, an annular dust-retarding cushion between said reflector and closure, said body and closure having coacting stops arranged to coact by a movement parallel to the axis of said reflector for fixing the limit of movement of said body and 0l0Slll'e toward one another, and spring wedge means between said body and closure acting to draw said body and closure toward one another upon relative rotary movement between said body and closure for causing coaction between said stops for maintaining said closure in fixed relation on said body and pressing said cushion between said closure and reflector.

9. In a lamp, the combination of a body, a reflector, means arranged for rotary movement between said reflector and body for limiting forward movement of said reflector, resilient means normally urging forward movement of said reflector while permitting its rotary movement, and a stop limiting rotary movement of said reflector maintained in active relation by the action of said resilient means.

10. In a lamp, the combination of a body, a reflector, a closure comprising a transparent member, said body and closure having coacting stops for fixing the longitudinal relation between said body and closure, spring means between said body and closure for causing coacting relation between said stops, and spring means between said body and reflector for causing movement of said reflector toward said closure, said respective spring means acting on opposite sides of said reflector, and said first-named spring means having greater resistance to yield than said last-named spring means.

11. .In a lamp, the combination of a body, a parabolic reflector received therein, a clo sure comprising a transparent member, saidclosure and body provided with coacting shoulders for fixing the limit of movement of said body and closure toward one another, spring-hooks coacting between said closure and body whereby upon turning of said closure said shoulders are brought into coacting relation for fixing said closure at said limit of movement on said body, and positioning means for said reflector;

12. In a lamp, the combination of a body, a parabolic reflector received therein, a closure comprising a transparent member, said closure and body provided with coacting shoulders for fixing the limit of movement of said shoulder and closure toward one another, spring-hooks coacting between said closure and body whereby upon turnin of said closure said shoulders are brought into coacting relation for fixing said closure at said limit .of movement on said body, dustretarding means between said reflector and said closure, and spring means acting upon said reflector positioning said dust-retarding means.

13. In a lamp, the combination of a body having an inwardly extending flange at its forward end, a reflector receii'ed in said body having an outwardly extending flange at its forward end, a closure comprising a transparent member, said closure and said body provided with coacting stops, said closure provided with a ledge, spring-hooks between said first-named flange and said' ledge for drawing said closure toward said body and causing coaction between sald stops, spring means between said first-namedflange and said second-named flange for urging said reflector towardsaid closure, and dust-retarding means between said reflector and closure acted on by said last-named spring means.

14. In a lamp. the combination of a body, spring-hooks extending forwardly therefrom, leaf-springsprovided with slots received about said spring-hooks, a reflector provided with an outwardly extending flange having slots received about said spring-hooks and a knob arranged to be received in one of said first-named slots whereby upon turning of said reflector for receiving said flange under said hooks said knob holds said reflector against rotation in the opposite direction, and a closure provided with a transparent member and having coacting parts for said spring-hooks for securing said closure to said body.

In testimony whereof, I have hereunto signed my name in the presence of two subscribing witnesses.

THOMAS J. CORCORAN.

Witnesses:

Gnome S. Hxwun, THERESA M. SILBER. 

